Phyllidia coelestis or P. varicosa?

October 7, 2001
From: Des Paroz


Hi Bill

Attached are photos of what I think is a Phyllidia coelestis. Not sure, as they are similar, but I think that this does not have the ridge found on the P. varicosa.

Found at "The Muck", Tufi Wharf, Papua new Guinea, in about 10m. Water temp 28C.

Best regards
Des

des@paroz.com

Paroz, D., 2001 (Oct 7) Phyllidia coelestis or P. varicosa?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5399

Dear Des,
Yes this is P. coelestis. The simplest difference to see in a photo is that P. coelestis has a broken black band down the midline and a ridge on each side of it, while in P. varicosa there is a bluish-grey ridge down the midline, with a black band on each side of it. If you can see the sole of the foot then P. varicosa has a median black line and P. coelestis does not.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Oct 7). Comment on Phyllidia coelestis or P. varicosa? by Des Paroz. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5399

Factsheet

Phyllidia coelestis

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